The UNIX user ID (UID) that a server running on this machine
will run under after it has carried out all privileged startup
actions. Otherwise, the server will continue to run under the
account under which it was started.(Requires that you enable
Post-Bind UID.)

The UNIX group ID (GID) that a server running on this machine
will run under after it has carried out all privileged startup
actions. Otherwise, the server will continue to run under the group
under which it was started.(Requires that you enable Post-Bind
GID.)